This type of ring is a small badge that workers wear under gloves to monitor external exposure to #radiation as they work with different types of radioactive sources. The little diamond shape on the ring is worn facing the palm, as this is the area where highest exposure usually occurs. This ring is just one of many different types of radiation exposure monitoring badges.
Badges like these are designed to help protect workers, contributing to safe and secure radiological conditions in the workplace, including regulating and limiting how much radiation exposure a person gets over time as well as to make sure that they stay within certain thresholds. The #IAEA helps to support countries in implementing the use of these handy devices in workplaces.